Trolley mechanism



A. W. HAM.

TROLLEY MECHANISNI.

APPLICATION FILED APR.I2,1919.

1,358,439. PndNov. 9,1920.

Enamel-Blauw v 6% d Lt' invento/a.

MfzJ/AM ALBERT W. HAM, OF TRY, NEW YORK.

TROLLEY MEGHANISM.

Speciicaton of Letters Patent.

Application rlled April 12, 1919. Serial No. 289,511.,

effectively controlling the overhead trolley to prevent its entanglementwith the cross wires and thereby damaging the saine when the trolleyescapes from the feed wire.

A further object is to construct an attachment of a novel characterwhich may be readily secured to any of the well known trolley baseswithout any material alteration to their parts, and adapted to withstandthe required conditions of service.

Another object of this invention is to provide an overhead trolleyconstruction that will serve to prevent the springs which retain thetrolley on contact with the feed wire from being distorted in the eventof the trolley wheel. escaping from or leavingV the feed wire.

Another object'of the invention isto provide selfreleasingtrolley-retaining mechanism in which the escape of the trolley wheelfrom the feed wire automatically releases the tension of the retainingsprings and allows the trolley pole to drop down out of the way of theoverhead suspension device; the mechanism being reset and the tension ofits springs restored by a. downward pull on the trolley pole.

The foregoing and such other objects as may appear from the ensuingdescription are attained by the novel features of construction,combination, arrangement and location of the parts hereinafter morefully described, illustrated in the accompanying drawings, andparticularly pointed out in the claims appended hereto, it beingunderstood that-slight changes in the precise form, proportion, andminor details of the construction may be resorted to without departingfrom the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings whichi iorm a part of this specification itwill be seen that:

y Figure 1 is aside elevation of. the device embodying myl invention,showing the trol ley in operative position on the trolley wire, and

.Fig- 2 is a mechanism.y y

Similar numerals of reference vare employed to designate like orequivalent parts wherever found throughout the several views.

In carrying out this invention, as illustrated, it will be seen that thenumeralV 1 indicates a base member, to. which is pivotally secured inany suitable manner by a shaft 2 the trolley pole 3, which is providedat its Patented News, mao,-

plan view of the improved upper end with a trolley Vwheel 1, which isadapted to engage the trolley or feed wire 5. Secured tothe lowermostend portion of the pole is the metallic member @formed :n

with two outward and downwardly extend! ing rocker arms 7, each of saidarms having av curved rim portion 8, and suitably secured tolowermostportion of each rim is a strap of sheet steel or any otherdesirable material 9, which extends rearwardly and Vis fiXedly securedto ametallic plate 10, to which plate one end of a series of coiled basesprings 11 are removably secured, the other end of eachf of said springsbeing removably fastened to a similar metallic plate 12, said platebeing provided with an aperture ,at its central portion adapted toreceive the hoolzedend portion 13 of a rod 14, which extends rearwardly,passing through a guideway 15 formed integralfwith the rear end of ametallic reach arm 16,V the front endrof said arm bein i suitablysecured to the baseV member 1. ecured to the threaded outer end portionof the rod 14C, by a securing nut 16 is an upwardly and forwardly curvedplate or bar 17, which extends forwardly, passing through guideways 18and 19, mounted iis Y ber 6, said member 21 having secured to one eloside thereof one end of a coiled spring 24, the other end of said springbeing secured to the upper rim portion of the arm 16. Secured to thepole in any suitable ordesirable manner is a member 25 adapted toVengage with a link-26 having connected thereto a rod 27, the rearhooked end portion of the latter passing through an aperture formed in amember 28 rigidly secured Vto the plate or bar 17.

lt will be readily perceived that when the trolley is setV for operationin contact with the trolley or feed wire the base springs 11 zwill beunder tension, hence when the trolley Y leaves or escapes from the saidwire the pole l will .swing on its pivot until the extension Y 23engages with and lifts the movable memL ber 2l out of the path of thefront end portion of the plate or bar V17, `which willimme'diately moveforward, simultaneously releasing the tension oil the series of base,springs 11, and thus permitting the trolley wheel to move into aposition below the span wires and therebyl preventing any vdamage to orentanglement with the overhead wires, and, when itis desired to resetthe device for operation it is, simply necessary to make a suliicientdownward pull on the trolley rope 30, when the member 25 `secured totheof the bar-17, and above the said extension,

whereby the said bar is held and locked under'tension'l ofV the basesprings Vby the movable latch or locking member 21, as will be readilyunderstood by those skilledin the art to which this invention relates.

lt is believed the construction and operation of my improved mechanismwill be readily understood, hence further description of the device isnot deemed necessary. Having thus described, my invention,

what I claim and desire to secure by Letters Patent is:

1. A `device of the character described,

comprising a base member, a trolley pole Vpivotally secured to saidmember, rocker Y Oral fruidewa formed at its rear end and a pluralityor" guideways supported on its upper surface, a movable bar connected tothe other end of said springs and passing through said guideways, alatch carried by the reach armA for locking and .unlocking the movablebar, a trip secured to one of the rocker arms for unlocking said latch,and means connected to and operatedby Vthe trolley pole to restoretension to said springs.

2. A devicevof the character described, comprising a base member, atrolley pole pivotally seeui'edto said member, a reach arm secured tothe basemember, rocker arms secured at the lower portion of tlie pole, atrip extension rigidly secured toY one of the rocker arms, a pluralityof base'springs secured at one end to the rocker arms, a slidable barsecuredto the other end of said springs, a spring pressed movable latchmember carried by the reach arm for locking said bar, and meansconnectedy to said bar and pole for operating the bar by the movement ofthe pole.

f A device ofthe character described, comprising a base member, atrolley pole -pivotally secured to said member, a reach arm secured tothe base member, rocker arms secured to the lower end oi the pole, aplurality of base springs secured atV one end to the rocker arms, a`slidable bar secured toy the otl'ieiend of said springs, a movablepivoted latch member carried by the reach arm for locking the bar, meanssecured to one of the rocker arms Jfor lii':`ting the movable latchmember to release the tension of the said springs, and means connectedto said bar and pole to restore tension to said springs.

ALBERT W'. HAM.

